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Ferroelectrics in Microwave Devices, Circuits and Systems: Physics, Modeling, Fabrication and Measurements (Engineering Materials and Processes)by Spartak Gevorgian
Synopses & Reviews
Todaya (TM)s wireless communications and information systems are heavily based on microwave technology, as are an increasing number of other industry sectors. The mobile phone is a typical example of a device which makes use of wireless technologies, often capable of also functioning as an Internet browser, GPS and/or TV. In order to cope with multiple communication channels and increasing bandwidth, whilst remaining user-friendly and cost-effective, both the mobile handsets and the associated systems must be agile (adaptable/reconfigurable).
The complex needs of society have inspired considerable interest in the field of cognitive and software defined radios and triggered extensive research in adequate components and technology platforms. To meet the stringent requirements to these systems, especially in agility and cost, new components with enhanced performances and new functionalities are needed. In this area, ferroelectrics have great potential and are already gaining ground.
Ferroelectrics are a class of materials characterized by spontaneous electric polarization. Components based on these materials have a broad range of commercial applications. The piezoelectric properties of the materials are exploited in sensors and actuators. When the electric dipoles are aligned (ferroelectric phase), the materials are widely used in memory cells. When the electric dipoles are not aligned (paraelectric phase), the materials have even greater potential for microwave applications. Many ferroelectrics, especially perovskites, exhibit good dielectric properties (low microwave loss and leakage currents), including an extremely high dielectric permittivity. As this permittivity isdependent on the applied electric field, mechanical stress and temperature, such materials are suitable for the development of tuneable microwave devices for applications in agile microwave systems.
This book offers a practical introduction into the physics, design, modelling, fabrication and measurement methods for ferroelectric components and devices. It also explores emerging functionalities and components with enhanced performance.
Today's wireless communications and information systems are heavily based on microwave technology, as are an increasing number of other industry sectors. Extensive research has been carried out into the development of new technologies to meet the increasingly complex requirements of such systems. Among these new technologies agile (tuneable, reconfigurable, and adaptable) microwave components based on ferroelectric materials, have great potential and are already gaining ground. Ferroelectrics in Microwave Devices, Circuits and Systems is an introduction to the field. It explores the emergence of new functionalities and components with enhanced performance that can meet the agility and cost requirements of modern microwave-based systems. The book provides the reader with practical knowledge in a range of areas, including: • physics, • fabrication technology, • methods of design, • modeling, and • measurement of ferroelectric components and devices. Ferroelectrics in Microwave Devices, Circuits and Systems is a useful research tool for both graduate and undergraduate students, as well as designers of microwave devices, circuits, and systems. The Engineering Materials and Processes series focuses on all forms of materials and the processes used to synthesise and formulate them as they relate to the various engineering disciplines. The series deals with a diverse range of materials: ceramics; metals (ferrous and non-ferrous); semiconductors; composites, polymers, biomimetics etc. Each monograph in the series is written by a specialist and demonstrates how enhancements in materials and the processes associated with them can improve performance in the field of engineering in which they are used.
About the Author
Spartak Gevorgian obtained his DrSci in Electrical and Electronics Engineering from the Electrotechnical University, St. Petersburg, Russia. He works as a profesor for the Chalmers University of Technology and also part-time for Ericsson AB, Mölndal, Sweden. As well as having been a professor for his former university in St. Petersburg, Spartak Gevorgian has also worked at the Polytechnic Institute, Yerevan, Armenia. He has been the co-ordinator of several EU projects, including NANOSTAR and MELODY.
Table of Contents
Overview of Agile Microwave Technologies.- Physics of the Tunable Ferroelectric Devices.- Fabrication of Ferroelectric Components and Devices.- Substrates, Varactors and Passive Components.- Ferroelectric Devices.- Circuit and System Applications of Tunable Ferroelectric Devices.- Modeling.- Measurements of the Dielectric Properties.- Potentials and Perspectives.
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